Everyday calculations
Use the result as a check within this type of task, with the assumptions shown above.
MAXScanner Calculator
Ratio Calculator
Simplify integer or decimal ratios, solve a missing proportion value, scale a ratio, and split a total into proportional shares with visible working.
Live editable inputs
Change the values and see the calculation update immediately.
Formula and working
The relationship behind the answer stays visible on the page.
Assumptions visible
Rates, dimensions and limitations are kept explicit instead of hidden.
Connected next steps
Move into the next genuinely different calculation without keyword-copy pages.
5 : 1
100 : 20 → Scale decimals to integers, then divide both terms by GCD 20.
How to use this calculator
Ratio Calculator applies the calculation described above to the values you enter. The result stays on this page so you can change inputs and compare another scenario without changing tools.
Step-by-step
- Step 1
Enter the values requested by the calculator.
- Step 2
Check the labels, units and assumptions shown.
- Step 3
Review the result before using it in another workflow.
Where this calculator is useful
Work and study checks
Use the result as a check within this type of task, with the assumptions shown above.
Planning and comparisons
Use the result as a check within this type of task, with the assumptions shown above.
Common questions
How do I use the Ratio Calculator?
Enter the labeled values above the result. The calculation updates from those inputs.
Why should I check the units?
A different unit or reference value can change the meaning of the result even when the number looks similar.
What if an input is invalid?
The calculator is designed to show an explicit validation message instead of silently switching to another calculation.
Need a different calculation?
Use the calculator library to switch tasks when the question, unit or assumption changes.
Browse all calculatorsRelated calculators
These calculators share this task context and lead to a genuinely different calculation.
Aspect Ratio Calculator — Simplify, Resize & Letterbox
Simplify pixel dimensions to an aspect ratio, calculate a proportional missing dimension and measure letterbox/pillarbox padding when fitting media inside a target frame.
Confidence Interval Calculator — Mean (z/t) & Proportion with Steps
Calculate 90%, 95% or 99% confidence intervals for a mean with known population SD, a mean with sample SD using t, or a proportion using the Wilson interval.
Debt-to-Income Ratio Calculator — Front-End, Back-End & Scenario DTI
Calculate housing and total debt-to-income ratios from itemized monthly obligations, then add a proposed new payment to see the scenario DTI without applying a one-size-fits-all approval threshold.
Fraction Simplifier — Reduce to Lowest Terms
Reduce a fraction to lowest terms using the greatest common divisor, normalize the sign, and show decimal and mixed-number forms with the reduction step.
Gear Ratio RPM Calculator — Speed, Cruise RPM & Overall Ratio
Solve theoretical road speed from RPM or engine RPM from road speed using transmission ratio, final drive and tire diameter, with overall gearing kept visible.
Investment Fee Calculator — Fee Drag vs No-Fee Growth
Compare a contribution-based investment projection with and without sales load, annual asset fees and an ending redemption fee, with the fee assumptions and return model kept editable.
Recipe Scaling Calculator — Fractions, Servings & Ingredient List
Scale a pasted ingredient list from original to target servings, parse common decimals, fractions, mixed numbers and Unicode fractions, and return practical scaled quantities without pretending cooking time scales linearly.
Transformer Turns Ratio Calculator — Solve Voltage or Winding Turns
Solve an ideal transformer for primary voltage, secondary voltage, primary turns or secondary turns from the other three values, with turns ratio, voltage ratio and ideal current-ratio context.